Downhole apparatus and method for expanding a tubing

Downhole apparatus for use in expanding tubing, the apparatus comprising:

• a body for connection to a string;
• an expansion portion on the body configurable to define a smaller diameter first configuration for running in and a larger diameter second configuration for expanding the tubing, the expansion portion including a plurality of radially movable parts for defining an outer surface thereof and which parts are axially and circumferentially offset for movement between the first and second configurations, and are axially alignable in the second configuration to define a substantially continuous outer circumference;
• and means for moving the parts between the first and second configurations, wherein said moving means is fluid pressure actuated.

Downhole apparatus for use in expanding tubing, the apparatus comprising:

• a body for connection to a string;
• an expansion portion on the body configurable to define a smaller diameter first configuration for running in and a larger diameter second configuration for expanding the tubing, the expansion portion including a plurality of radially movable parts for defining an outer surface thereof and which parts are axially and circumferentially offset for movement between the first and second configurations, and are axially alignable in the second configuration to define a substantially continuous outer circumference;
• and means for retracting the parts from the second configuration to the first configuration, wherein the retracting means includes a biasing arrangement.

Downhole apparatus for use in expanding tubing, the apparatus comprising:

• a body for connection to a string;
• an expansion portion on the body configurable to define a smaller diameter first configuration for running in and a larger diameter second configuration for expanding the tubing, the expansion portion including a plurality of radially movable parts for defining an outer surface thereof and which parts are axially and circumferentially offset for movement between the first and second configurations, and are axially alignable in the second configuration to define a substantially continuous outer circumference;
• and means for retracting the parts from the second configuration to the first configuration, wherein the retracting means is fluid pressure actuated.

Downhole apparatus for use in expanding tubing, the apparatus comprising a body for connection to a string and an expansion portion on the body configurable to define a smaller diameter first configuration for running in and a larger diameter second configuration for expanding the tubing, the expansion portion including a plurality of radially movable parts for defining an outer surface thereof and which parts are axially and circumferentially offset for movement between the first and second configurations, and are axially alignable in the second configuration to define a substantially continuous outer circumference, wherein the parts are pivotally mounted fingers.